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U0168 Buick Code - Lost Communication With Keyless Entry Control Module

Quick Answer

The U0168 Buick code indicates that the vehicle has lost communication with the keyless entry control module. Common causes include Faulty keyless entry control module, Wiring issues or loose connections in the keyless entry system, Interference from other electronic devices affecting communication. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
U0168 Buick indicates Lost Communication With Keyless Entry Control Module.
Common causes
Common causes include Faulty keyless entry control module, Wiring issues or loose connections in the keyless entry system, Interference from other electronic devices affecting communication.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code U0168 Buick Description

The U0168 Buick code indicates that the vehicle has lost communication with the keyless entry control module. The keyless entry control module is responsible for managing the keyless entry system, which allows the driver to lock, unlock, and start the vehicle without using a physical key. When communication is lost with this module, it can cause issues with the keyless entry system, potentially leading to difficulties in locking and unlocking the vehicle, as well as starting the engine.

OBDII Code U0168 Buick - Lost Communication With Keyless Entry Control Module
U0168 Buick Code - Lost Communication With Keyless Entry Control Module

Common Causes of U0168 Buick

  1. Faulty keyless entry control module
  2. Wiring issues or loose connections in the keyless entry system
  3. Interference from other electronic devices affecting communication
  4. Software glitch in the vehicle's main computer system
  5. Water damage or corrosion in the keyless entry control module

Symptoms of U0168 Buick

  1. Inability to lock or unlock the vehicle using the keyless entry system
  2. Keyless entry system not responding to remote commands
  3. Engine not starting when using keyless start button
  4. Warning light on the dashboard indicating a keyless entry system fault

How to Fix U0168 Buick

  1. Diagnose the issue using a diagnostic tool to identify the specific cause of the communication loss
  2. Check the wiring and connections in the keyless entry system for any damage or loose connections
  3. Replace the keyless entry control module if it is found to be faulty
  4. Clear the diagnostic trouble codes and test the keyless entry system to ensure proper functionality
  5. Verify that the communication with the keyless entry control module has been restored before completing the repair process

Cost to Fix U0168 Buick

The typical repair costs for resolving the U0168 Buick code can vary depending on the specific cause of the communication loss. In general, the cost of replacing a faulty keyless entry control module can range from $200 to $500, including both parts and labor. However, additional costs may apply if wiring repairs or software updates are needed. It is important to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of the vehicle. Keep in mind that diagnostic time and labor rates can vary, so it's recommended to inquire about rates at local auto repair shops for a more precise estimate.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0168 Buick Code

1. What are the common symptoms of OBDII code U0168 in a Buick related to lost communication with the keyless entry control module?

- Common symptoms include key fob not working, inability to remotely lock or unlock doors, and issues with the vehicle's anti-theft system.

2. What are the possible causes of OBDII code U0168 in a Buick?

- The code U0168 in a Buick typically indicates a communication error between the keyless entry control module and the vehicle's main computer. This can be caused by a faulty key fob, wiring issues, a defective control module, or a software glitch.

3. How can I diagnose the cause of OBDII code U0168 in my Buick?

- To diagnose the issue, you can start by checking the key fob battery, ensuring the key fob is functioning properly, inspecting the wiring connections, and using a diagnostic scanner to pinpoint the exact source of the communication problem.

4. Is it safe to continue driving my Buick with OBDII code U0168 related to lost communication with the keyless entry control module?

- While the vehicle may still be drivable, it's best to address the issue promptly to avoid potential inconvenience or security concerns related to the keyless entry system not functioning properly.

5. Can I repair OBDII code U0168 in my Buick myself?

- Depending on the cause of the communication error, repairs may range from replacing the key fob battery to repairing wiring or replacing the keyless entry control module. Simple fixes like battery replacement can be done by the owner, while more complex issues may require professional assistance.

6. Will resetting the OBDII code U0168 in my Buick resolve the communication problem with the keyless entry control module?

- Resetting the code may temporarily clear the error message, but if the underlying issue causing the communication problem persists, the code is likely to reappear. It's important to diagnose and address the root cause of the problem for a lasting solution.

7. How much does it typically cost to repair OBDII code U0168 in a Buick?

- The cost of repairing OBDII code U0168 can vary depending on the specific cause of the communication error. Simple fixes like replacing a key fob battery may cost less, while more involved repairs like replacing the control module can be more expensive.

8. Can a faulty keyless entry control module cause other issues besides triggering OBDII code U0168 in a Buick?

- Yes, a faulty keyless entry control module can cause other issues such as intermittent door locking/unlocking problems, malfunctioning alarm systems, and issues with remote start functionality.

9. Is it possible to bypass the keyless entry system in my Buick if I'm unable to repair OBDII code U0168?

- Bypassing the keyless entry system is not recommended as it can compromise the security and convenience features of your vehicle. It's best to address the underlying issue causing the communication error for proper functionality.

10. Can extreme weather conditions affect the keyless entry control module in a Buick and trigger OBDII code U0168?

- Extreme temperatures or moisture exposure can potentially impact the performance of the keyless entry control module and lead to communication errors. Keeping the key fob and control module dry and protected can help prevent such issues.

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